Dolphus tourey



(N0 Mow.) M DbTORREY.

AUTOMATIC TAKE-UP FOR GAR BRAKES.

Patented May 1,1883.

u-um mr, Washinglun. n. c,

UNITED STATES PATENT Glance.

DoLrHns TORREY, on NEW YORK, N. Y.

AUTOMATIC TAKE-UP FOR CAR-BRAKES.

SPECIFICATION forming part of Letters Patent No. 276,929, dated May 1, 1883.

V Application filed November 8, 1882. (No model.)

To all whom it may concern Be it known that I, DOLPHUS Tonnnv, a citizen of the United States, residing in the city of New York, county and State ofNew York, haveinventcd an Improvement in Automatic Take-Ups for Rail way-Brake Apparatus, of which the following is a specification.

The object of my invention is to combine mechanical devices, placed in the line of the brake-chain, so that as the brake-shoes are worn by use the length of the chain will be shortened, and thereby keep the shoes, when out of use, hanging at a fixed distance from the wheels, thus securing the advantage of having at all times, whether the brake-shoes are new or old, a uniform movement of the brake-operating mechanism to effect an application of the brakes. I placeupon a shaft two pulleys having clutch-teeth between them. To each of the pulleys is attached a part of the line of brake-chain, that upon onethe working-pulley-extending to the brake apparatus, and that upon the other-thereceiving-pulley-to the operating mechanism. When the chain is pulled to apply the brakes the rotation of the receiving-pulley compels, as the chain is unwound, the rotation of the companion pulley and the winding up of its attached chain. The workingpnlley carries from its side opposite the receiving-pulley a projectingpin, which passes through a slot in a disk mounted upon the shaft with the pulleys. This disk has ratchet-teeth in its edge or under surface, which teeth are engaged by a pawl, that permits the forward rotation of thedisk, but prevents its backward rotation. The receiving-pulley is subject to the recoil of a spring, which rotates it backward to the extent of its movement permitted by the counter-pull of the brake-chain wound upon it. When the brakes are applied the pull of the chain rotates the two pulleys,

which are engaged with each other. The pin in the working-pulley moves freely until it reaches the end of the slot in the disk, when it carries the disk with it. WVhatevcr distance the disk is rotated it is held by its pawl, and so when the braking stress is released the backward rotation of the two pulleys takes place without changing the position of the disk. The working-pulley rotatesbackward until its pin reaches the end of the slot, when the pulley is held and cannot give any more slack to the brakes; but the receiving-pulley is, by the stress of its counter-spring, compelled to continue its backward rotation until the chain attached to it is taut. In doing this it rides past the clutch-teeth of the otherpulley and secures a shortened hold thereon. The pulley-shaft may be set horizontally or in any direction. I prefer-to have it perpendicular, as then the engagement between the pulleysis made by g'raw it) instead of with a spring, as will be necessary in other cases.

In order that my invention may be fully un derstood, I will describe it with reference to the accompanying drawings, in which- Figure 1 is a front view of thetake-up. Fig.

2 is a side view of the same take-up from the opposite side to that shown in Fig. 1. Fig. 3 is a top view thereof. Fig. 4 is an under side view of the ratchet-disk. Fig. 5 is a plan view of a modified form of the receiving-pulley. Fig. 6 is a plan of a modified form of ratchetdisk. Fig. 7 is a sectional view, showing the application of themodilied form of receivingpnlley and ratchet-disk.

1 is the receiving-pulley; 2, the workingpulley; 4, the frame, within which the take-up is mounted upon the shaft 15. 3 is the ratchet-disk; 5, the chain from the apparatus working the brakes; 6, the chain from the take-up to the brakes; 7 the clutch-teeth; S, the ratchet-teeth upon the disk. 9 is the slot in the disk, within which the pin 12 moves. The length of this slot measures the amount of slack allowed the brake-shoes when off. 10 is the pawl which holds the disk from rotating backward. 11 is the slot through the hanger, in which the pawl is mounted. 13 is the pin in the receiving-pulley, and against which the spring 14 acts to compel the backward rota tion of the pulley. 'The shaft may be made so as to not rotate, and can then be used to attachthe spring 14 to. I have shown the pawl 10 as reset by gravity, but contemplate the use of a spring for this purpose, and as will be necessary with some positions of the mechanism. The pulleys may differ in diameter and be dit ferential pulleys, and the receiving-pulley may be mutilated to increase the differences be tween the two.

In place of the slot 9 in the disk, the rim of the disk may be cut away, or there may be lugs upon the disk.

With the modification in form of receivingpulley illustrated in Figs. 5 and 7, the operating-chain from the draw-baror other motor, acting first at a short radius from the center of said pulley, imparts rapid rotation thereto, so as to instantly bring the brake-shoes to their bearings against the wheels, after which it acts at a greater radial distance from the center, with consequently increased power. Havingthus described my invention, the following is what I claim as new-therein and desire to secure by Letters Patent:

1. An attachment for car-brakes serving to neutralize the eft'ectot' wear in the brake-shoes upon thebrake meclianism,whcrebyunil'ormity in the movements of the brake inechanismand brake-shoes is preserved, the said attachment consisting of a receiving member connected with the brake-operating mechanism, a working member actuated by the receiving member and connected with the brake mechanism, and a stop operating, in connection with the working member, to limit the movement of said working member when the-brakes are re leased.

2. In an automatic take-up for car-brakes, the combination of a receiving member connected with the brake operating devices, having a series of clutch-teeth and provided with an attachment for returning it to its original position upon the release of the said brakeoperating devices, av working member connected with the brake mechanism and provided with a series of clutch-teeth engaging with those of the receiving member, and a stop operating, in connectionlwith the operating member, to limit the movement thereof 0 when the brakes are released.

3. In an automatic take-up for car-brakes, the combination, with a receiving-pulley connected with the brake-operating devices and provided with a spring for returning it to its normal position, and also on one of its sides I with a series of clutch-teeth, and a working- I slot, a recess, or lugs with which the pin of 5 DOLPHUS TURKEY.

Witnesses:

WM. B. CARPENTER, W. T. MOJILTON. 

